Each voice plays notes with register D (organ) unless a different register is assigned to that voice. This is the default voice/register assignment. ORCH-9C)'s "Y" symbol may be used to assign a register to a voice. For example, V4YC assigns register C (clarinet) to Voice 4. After this assignment, all notes played by Voice 4 would sound like a clarinet.
ORCH-90's default voice register assignments look like this:
V1 YD V2YD V3YD V4YD V5YD
If no register assignments occur in the music file, the voices play their programmed notes with the organ (register D) sound.
Here comes the great flexibility of the system. You can switch register assignments anywhere in the music file! Insert a Part Number prior to the measure of music in which the changes are to occur. On the same line, indicate the new voice/register assignments. You can assign different instruments to any or all of the voices at a Part Number. A typical Part Number and register assignment would be:
Voice 1 will now play notes using the TRUMPET sound (register A), Voice 2 uses the OBOE sound (register B), Voice 3 uses the VIOLIN sound (register E), and Voice 5 uses the CLARINET sound (register C).
Voice 4 wasn't changed, so it continues playing with the ORGAN sound (register D) or whatever instrument register was previously assigned to it.
The Part NUMBER itself has no effect on the registers. Using a Part Number alerts the compiler (SCORE command) that voice/register changes may occur.
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